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【简答题】
阅读理解。 The Beets were a new couple (夫妇). The things in their rooms, such as the television, the computer, the fridge, furniture and so on, were all left by their parents. They only paid some money for their food and clothes. But they tried their best to save money. If they had something important to tell their friends, they always visited them instead of calling them. One day, it was a quarter past nine. Mr Beet didn't come back. His wife was a little worried. The supper was cold and she had waited for two hours and a half. She was sitting by the table in the dark room. Suddenly the woman heard someone coming upstairs. It was her husband's step. She hurried to open the door. In the dark she could hear his deep breathing. As soon as he sat down, she turned on the light and found he looked very tired. 'Why do you come back so late, dear?' asked the woman. 'Haven't you caught a bus?' 'Yes, but I didn't take it.' 'Why not?' 'I ran after it so that I saved two dollars this evening.' 'That's great!' the woman said happily. 'Run after a taxi next time and you'll save both more time and money.' 1. The supper was ready at . [     ] A. 6:15 B. 6:30 C. 6:45 D. 7:15 2. Mrs Beet sat in the dark because . [     ] A. she wanted to save money B. she didn't like the bright light C. she was afraid to be seen D. she wanted to have a good rest 3. Mr Beet went back . [     ] A. by taxi B. by bus C. on foot D. by bike 4. When Mr Beet got home that evening, . [     ] A. his wife was angry with him B. he was very tired C. he was too hungry to say a word D. his wife felt sorry 5. Mrs Beet hoped . [     ] A. her husband went home by bus the next time B. her husband could keep on doing exercise C. her husband could be stronger and stronger D. her husband could save more money and time
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参考答案:
举一反三
【多选题】Words that signal additional information
A.
words, and
B.
furthermore, additionally, moreover
C.
too, in addition
D.
not only... but also
E.
as long as,besides
【判断题】游客人住泰国宾馆,遇见服务人员应行合十礼。( )
A.
正确
B.
错误
【多选题】What are signal words?
A.
first
B.
next
C.
finally
D.
words in bold
【单选题】直线x-y-1=0的倾斜角为
A.
30 0
B.
45 0
C.
60 0
D.
135 0
【单选题】直线x-y=0的倾斜角为()
A.
30 °
B.
45°
C.
60°
D.
90°
【简答题】请说明片剂含量均匀度测定初试方法?
【简答题】简述经济学家研究经济问题的三大基本动机是什么?
【多选题】How does a Ca 2+ signal trigger multiple biological processes/responses?
A.
A surge in the cytosolic concentration of free Ca 2+ is triggered by many kinds of cell stimuli, not only those that act through GPCRs. When a sperm fertilizes an egg cell, for example, Ca 2+ channels open, and the resulting rise in cytosolic Ca 2+ triggers the egg to start development; for muscle cells, a signal from a nerve triggers a rise in cytosolic Ca 2+ that initiates muscle contraction; and in many secretory cells, including nerve cells, Ca 2+ triggers secretion. Ca 2+ stimulates all these responses by binding to and influencing the activity of various Ca 2+ -responsive proteins.
B.
The effects of Ca 2+ in the cytosol are largely indirect, in that they are mediated through the interaction of Ca 2+ with various kinds of Ca 2+ -responsive proteins. The most widespread and common of these is calmodulin, which is present in the cytosol of all eukaryotic cells that have been examined, including those of plants, fungi, and protozoa. When Ca 2+ binds to calmodulin, the protein undergoes a conformational change that enables it to interact with a wide range of target proteins in the cell, altering their activities.
C.
One particularly important class of targets for calmodulin is the Ca 2+ /calmodulin-dependent protein kinases (CaM-kinases). When these kinases are activated by binding to calmodulin complexed with Ca 2+ , they influence other processes in the cell by phosphorylating selected proteins.
D.
In the mammalian brain, for example, a neuron-specific CaM-kinase is abundant at synapses, where it is thought to play an important part in some forms of learning and memory. This CaM-kinase is activated by the pulses of Ca 2+ signals that occur during neural activity, and mutant mice that lack the kinase show a marked inability to remember where things are.
【单选题】自感电动势的大小正比于流经电感自身电流的( )。
A.
大小
B.
方向
C.
变化量
D.
变化率
【判断题】Many signal words can give more than one kind of signals, but usually the context makes it immediately clear which signal is intended.
A.
正确
B.
错误
相关题目:
【多选题】How does a Ca 2+ signal trigger multiple biological processes/responses?
A.
A surge in the cytosolic concentration of free Ca 2+ is triggered by many kinds of cell stimuli, not only those that act through GPCRs. When a sperm fertilizes an egg cell, for example, Ca 2+ channels open, and the resulting rise in cytosolic Ca 2+ triggers the egg to start development; for muscle cells, a signal from a nerve triggers a rise in cytosolic Ca 2+ that initiates muscle contraction; and in many secretory cells, including nerve cells, Ca 2+ triggers secretion. Ca 2+ stimulates all these responses by binding to and influencing the activity of various Ca 2+ -responsive proteins.
B.
The effects of Ca 2+ in the cytosol are largely indirect, in that they are mediated through the interaction of Ca 2+ with various kinds of Ca 2+ -responsive proteins. The most widespread and common of these is calmodulin, which is present in the cytosol of all eukaryotic cells that have been examined, including those of plants, fungi, and protozoa. When Ca 2+ binds to calmodulin, the protein undergoes a conformational change that enables it to interact with a wide range of target proteins in the cell, altering their activities.
C.
One particularly important class of targets for calmodulin is the Ca 2+ /calmodulin-dependent protein kinases (CaM-kinases). When these kinases are activated by binding to calmodulin complexed with Ca 2+ , they influence other processes in the cell by phosphorylating selected proteins.
D.
In the mammalian brain, for example, a neuron-specific CaM-kinase is abundant at synapses, where it is thought to play an important part in some forms of learning and memory. This CaM-kinase is activated by the pulses of Ca 2+ signals that occur during neural activity, and mutant mice that lack the kinase show a marked inability to remember where things are.
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